When did momondo last update prices for flights from District of Columbia to Ko Samui Airport?

Prices for flights from District of Columbia to Ko Samui Airport refresh daily.

How old do you have to be to fly from District of Columbia to Ko Samui Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Ko Samui Airport.

What documentation or ID do you need to fly to Ko Samui Airport?

The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$543 Cheap Flights from District of Columbia to Ko Samui in 2026

Find the cheapest flights from District of Columbia to Ko Samui

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:10 pm - 7:10 am

IAD

USM

29h 00m

2 stops

5:55 pm - 9:45 am

USM

IAD

26h 50m

2 stops

$1,073Multiple Airlines

Wed, Sep 16 - Wed, Sep 23

3:10 pm - 11:15 am

IAD

USM

33h 05m

2 stops

5:25 pm - 9:45 am

USM

IAD

27h 20m

2 stops

$1,090Multiple Airlines

Fri, Sep 11 - Tue, Sep 15

3:35 pm - 5:00 pm

IAD

USM

38h 25m

2 stops

9:20 am - 9:05 am

USM

IAD

35h 45m

2 stops

$1,109Multiple Airlines

Mon, Oct 26 - Mon, Nov 2

3:10 pm - 8:15 am

IAD

USM

30h 05m

2 stops

5:50 pm - 9:45 am

USM

IAD

26h 55m

2 stops

$1,116Multiple Airlines

Tue, Sep 1 - Tue, Sep 15

3:10 pm - 7:10 am

IAD

USM

29h 00m

2 stops

5:25 pm - 10:05 am

USM

IAD

27h 40m

2 stops

$1,139Multiple Airlines

Sun, Oct 18 - Sat, Oct 24

3:10 pm - 7:10 am

IAD

USM

29h 00m

2 stops

5:25 pm - 10:05 am

USM

IAD

27h 40m

2 stops

$1,144Multiple Airlines

Sun, Oct 18 - Sat, Oct 24

9:45 pm - 9:20 am

IAD

USM

24h 35m

2 stops

5:35 pm - 11:35 am

USM

IAD

29h 00m

2 stops

$1,304Turkish Airlines

Sun, Sep 13 - Thu, Sep 17

9:45 pm - 8:15 am

IAD

USM

23h 30m

2 stops

3:20 pm - 11:35 am

USM

IAD

31h 15m

2 stops

$1,342Turkish Airlines

Sun, Sep 13 - Thu, Sep 17

9:00 pm - 1:55 pm

IAD

USM

29h 55m

2 stops

3:25 pm - 3:40 pm

USM

IAD

35h 15m

2 stops

$1,388Qatar Airways

Sun, Sep 13 - Thu, Sep 17

6:58 pm - 7:40 pm

DCA

USM

37h 42m

2 stops

11:55 am - 8:59 pm

USM

DCA

44h 04m

2 stops

$2,238Cathay Pacific

Thu, Aug 20 - Thu, Aug 27

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Turkish Airlines flights from District of Columbia to Ko Samui

Our best Turkish Airlines deals on District of Columbia to Ko Samui flight tickets

Turkish Airlines

Sep 13

IAD9:45 pmWashington, D.C. Dulles Intl

24h 35m

2 stops

USM9:20 amKo Samui

Sep 17

USM5:35 pmKo Samui

29h 00m

2 stops

IAD11:35 amWashington, D.C. Dulles Intl

$1,304

Turkish Airlines

Sep 13

IAD9:45 pmWashington, D.C. Dulles Intl

23h 30m

2 stops

USM8:15 amKo Samui

Sep 17

USM3:20 pmKo Samui

31h 15m

2 stops

IAD11:35 amWashington, D.C. Dulles Intl

$1,342

Turkish Airlines

Sep 13

IAD9:45 pmWashington, D.C. Dulles Intl

24h 35m

2 stops

USM9:20 amKo Samui

Sep 17

USM5:35 pmKo Samui

29h 00m

2 stops

IAD11:35 amWashington, D.C. Dulles Intl

$1,399

Qatar Airways flights from District of Columbia to Ko Samui

Our best Qatar Airways deals on District of Columbia to Ko Samui flight tickets

Qatar Airways

Sep 13

IAD9:00 pmWashington, D.C. Dulles Intl

29h 55m

2 stops

USM1:55 pmKo Samui

Sep 17

USM3:25 pmKo Samui

35h 15m

2 stops

IAD3:40 pmWashington, D.C. Dulles Intl

$1,388

Qatar Airways

Dec 26

IAD8:05 pmWashington, D.C. Dulles Intl

28h 30m

2 stops

USM12:35 pmKo Samui

Jan 3

USM7:00 pmKo Samui

32h 55m

2 stops

IAD3:55 pmWashington, D.C. Dulles Intl

$2,157

momondo Fare Finder

Use the filters below to find and compare flights from District of Columbia to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Wed 9/16

3:10 pm-7:10 am

2 stops29h 00m

Ko Samui

Wed 9/23

5:55 pm-9:45 am

2 stops26h 50m

$1,073

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Fri 9/11

3:10 pm-11:15 am

2 stops33h 05m

Ko Samui

Tue 9/15

5:25 pm-9:45 am

2 stops27h 20m

$1,090

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Mon 10/26

3:35 pm-5:00 pm

2 stops38h 25m

Ko Samui

Mon 11/2

9:20 am-9:05 am

2 stops35h 45m

$1,109

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Tue 9/1

3:10 pm-8:15 am

2 stops30h 05m

Ko Samui

Tue 9/15

5:50 pm-9:45 am

2 stops26h 55m

$1,116

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 10/18

3:10 pm-7:10 am

2 stops29h 00m

Ko Samui

Sat 10/24

5:25 pm-10:05 am

2 stops27h 40m

$1,139

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 10/18

3:10 pm-7:10 am

2 stops29h 00m

Ko Samui

Sat 10/24

5:25 pm-10:05 am

2 stops27h 40m

$1,144

Quickest round-trip

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 9/13

9:45 pm-9:20 am

2 stops24h 35m

Ko Samui

Thu 9/17

5:35 pm-11:35 am

2 stops29h 00m

$1,304

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 9/13

9:45 pm-8:15 am

2 stops23h 30m

Ko Samui

Thu 9/17

3:20 pm-11:35 am

2 stops31h 15m

$1,342

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 9/13

9:00 pm-1:55 pm

2 stops29h 55m

Ko Samui

Thu 9/17

3:25 pm-3:40 pm

2 stops35h 15m

$1,388

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 8/20

6:58 pm-7:40 pm

2 stops37h 42m

Ko Samui

Thu 8/27

11:55 am-8:59 pm

2 stops44h 04m

$2,238

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from District of Columbia to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from District of Columbia to Ko Samui?

Etihad Airways and Cathay Pacific are the most popular carriers operating from District of Columbia to Ko Samui

Cheap District of Columbia to Ko Samui flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to Ko Samui

Fastest flight time	26h 30m
Direct flights	None

The fastest flight from District of Columbia to Ko Samui takes 26h 30m

There are no direct flights from District of Columbia to Ko Samui. There are no popular flight routes from District of Columbia to Ko Samui.

Search flight deals

Frequently asked questions about flying from District of Columbia to Ko Samui

When did momondo last update prices for flights from District of Columbia to Ko Samui Airport?
Prices for flights from District of Columbia to Ko Samui Airport refresh daily.
How old do you have to be to fly from District of Columbia to Ko Samui Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Ko Samui Airport.
What documentation or ID do you need to fly to Ko Samui Airport?
The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Ko Pha Ngan

Ko Tao

Khanom

Why use momondo?

Why should I use momondo to find a flight deal from District of Columbia to Ko Samui?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from District of Columbia to Ko Samui. momondo saves you time and could save you money on your trip.

Can I find flights from District of Columbia to Ko Samui with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ko Samui from District of Columbia with this policy.

How can momondo help me find flights from District of Columbia to Ko Samui?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ko Samui from District of Columbia.

I’m not ready to book a flight from District of Columbia to Ko Samui right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of District of Columbia to Ko Samui flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from District of Columbia to Ko Samui from $543

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from District of Columbia to Ko Samui departing on 8/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from District of Columbia to Ko Samui

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Big names and deals

Big names and deals

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Filter for what you want

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Turkish Airlines flights from District of Columbia to Ko Samui

Our best Turkish Airlines deals on District of Columbia to Ko Samui flight tickets

Qatar Airways flights from District of Columbia to Ko Samui

Our best Qatar Airways deals on District of Columbia to Ko Samui flight tickets

momondo Fare Finder

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How to get the cheapest flight ticket from District of Columbia to Ko Samui

What is the cheapest airline that flies from District of Columbia to Ko Samui?

Cheap District of Columbia to Ko Samui flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from District of Columbia to Ko Samui

Traveling to a place near Ko Samui?

Why use momondo?

An easier way to manage your Ko Samui trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Thailand

Airports servicing Thailand

Cabin classes currently available on flights to Ko Samui

List of cabin classes available on flights landing in Ko Samui. Availability may vary depending on flight origin and airline.

Popular cities in Thailand

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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